Troubleshooting

Disconnect the machine from the power source before making any repair.

Symptom	Cause	Solution

Motor will not start.	On/Off switch is in the “OFF” (O)	Turn switch to the “ON” (I) position
	position.

	Power cord is not plugged in.	Plug in power cord.

	Extension cord is too long.	Replace extension cord with either
	Extension cord is not proper gauge.	a 25 ft. 12/3 gauge cord or a 50
	Extension cord is damaged.	ft. 10/3 gauge cord.

	Electrical outlet does not supply	Try a different outlet.
	adequate power.

Unit does not reach high	Diameter of garden hose is too	Replace with a 1/2 inch or 5/8 inch
pressure.	small.	garden hose.

	Water supply is restricted.	Check garden hose for kinks, leaks
		and blockage.

	Not enough inlet water supply.	Open water source full force.

	Water inlet filter is clogged.	Remove filter and rinse out in
		warm water.

	Spray wand is on low pressure	Turn spray wand to high pressure
	position.	position.

Output pressure varies high	Not enough inlet water supply.	Turn water on full force. Check
and low.		garden hose for kinks, leaks or
		blockage.

	Pump is sucking air.	Check that hoses and fittings are
		air tight. Turn off machine and
		purge pump by squeezing trigger
		gun until a steady flow of water
		emerges through the nozzle.

	Water inlet filter is clogged.	Remove filter and rinse out in
		warm water.

	Discharge nozzle is obstructed.	Blow out or remove debris with a
		fine needle.

	Calcified gun, hose or spray wand.	Run distilled vinegar through
		detergent tank.

K 3.79 M specifications

The Karcher K 3.79 M is a powerful and versatile pressure washer designed for both residential and light commercial use. Known for its compact design and efficient operation, the K 3.79 M is ideal for tackling a variety of cleaning tasks, from washing cars and bikes to cleaning patios, decks, and outdoor furniture.

One of the main features of the Karcher K 3.79 M is its robust motor, which delivers a maximum pressure of 120 bar. This level of pressure allows users to effortlessly blast away dirt, grime, and stains from various surfaces. The pressure washer is equipped with an adjustable nozzle, enabling users to switch between different spray patterns, from a gentle fan spray for delicate surfaces to a concentrated jet for tougher cleaning tasks.

The K 3.79 M also comes with a built-in detergent tank, allowing for the efficient application of cleaning solutions. This feature is particularly useful for deep cleaning jobs, such as washing cars or restoring the shine to outdoor furniture. The detergent can be easily mixed with water and dispensed directly through the pressure washer, ensuring a thorough clean.

Another notable characteristic of the Karcher K 3.79 M is its lightweight and portable design. Weighing just around 10.5 kg, it is easy to maneuver and transport, making it suitable for various cleaning tasks around the home or garden. Additionally, the built-in wheels provide added mobility, allowing users to move the unit across uneven surfaces with ease.

In terms of technology, the K 3.79 M features Karcher's innovative Quick Connect system. This allows for easy attachment and detachment of the high-pressure hose, making setup and storage more convenient. The pressure washer also boasts an automatic stop function that turns off the motor when the trigger gun is released, helping to conserve energy and reduce wear and tear on the unit.

Overall, the Karcher K 3.79 M is a reliable and efficient pressure washer that combines power with portability. Its user-friendly design and advanced features make it suitable for a wide range of cleaning applications, making it an excellent choice for homeowners and small business owners alike. Whether you need to clean your patio, wash your car, or tackle outdoor cleaning projects, the K 3.79 M delivers impressive performance and results.